Six 200W panels + two 515W DMEGC panels into an Anenji ANJ-4000W-24V-WIFI hybrid inverter, which has a single PV input.
The inverter's limits
1PV input (one MPPT)
60–500VMPPT voltage range
500Vmax open-circuit voltage
15Amax solar input current
4,500Wmax PV array power
Model, 4,500W, 60V minimum, 500V maximum and 100A charge current are from the label on the unit. The 15A input current and the voltage range are from Anenji's datasheet for this exact model. Every figure on this page that involves the inverter assumes this model.
Why this is tricky
Series adds voltage, but every panel has to carry the same current. The weakest panel sets the pace for all of them.
Parallel adds current, but the strings join at the same voltage. Mismatched voltages pull each other off their best point.
The 200W panels top out around 7.4A. The 515W panels can push 14.88A. Put them in the same series string and the 515W panels are throttled to about half. The inverter's 15A input cap rules out wiring everything in parallel (about 74A at only 24–35V). Grouping the panels by size and paralleling the groups does not fit either: the 515W pair alone is 14.9A, so adding two 200W strings would be about 30A, double the limit. So there are two realistic ways forward.
Two balanced strings in parallel — no new hardware
Each string has three 200W panels plus one 515W panel, so both strings sit at about the same voltage and the same current.
~1,590Westimated harvest
~107Vworking voltage
14.8Ainput current (limit 15A)
$0extra hardware
Benefits
No extra parts to buy or fail.
About 107V sits comfortably inside the 60–500V window, even on hot days.
Matched strings avoid the voltage-mismatch loss of the earlier two-string layout.
Two separate strings means shade on one does not drag down the other.
Downsides
Each 515W panel is throttled to about 7.4A, so roughly 500–640W of potential is thrown away.
Sits at 14.8A against a 15A limit, so there is almost no headroom.
Short-circuit current of two strings can exceed 15A, which matters if the limit is an Isc rating.
Shade on any panel still pulls down its own whole string.
Needs re-cabling between rows, so check the cable runs reach.
One 8-panel series string (about 215V, 7.4A) would harvest the same with simpler wiring and half the current, but a single shaded panel would then cut the whole array.
Option B
One series string with a Tigo optimizer on each 515W panel
The optimizer takes the 515W panel's high current and low voltage and converts it to about 7.4A at about 70V, so it matches the 200W panels in the same string.
~2,100Westimated harvest
~284Vworking voltage
7.4Ainput current (limit 15A)
2 unitsextra hardware to buy
Benefits
Both 515W panels run at full power, about 500W more than Option A.
High voltage and low current: about 7.4A against a 15A limit leaves lots of headroom and runs the wires cooler.
About 284V is far above the 60V minimum and well inside the 500V maximum, and the cold-morning open-circuit voltage (roughly 175V from the 200W panels plus the optimizer outputs) stays far below 500V.
Each optimized panel handles shade on its own, so a shaded 515W panel no longer drags down the string.
Simple to extend later, since another panel only needs to match 7.4A or get its own optimizer.
Downsides
Costs money, and the optimizers are two more parts that can fail outdoors.
The 200W panels are still in plain series, so shade on one of them still pulls down the whole string.
Verify the TS4-A-O datasheet for input current and short-circuit current against the 515W panel (about 14.88A working point).
Verify its output voltage range reaches about 70V, and that Tigo allows it in a string with non-optimized panels.
Side by side
Estimated power into the inverter (nameplate total: 2,230W)
Panel nameplate
2,230W
Option A: two strings
~1,590W
Option B: with Tigo
~2,100W
Both options are well under the inverter's 4,500W PV limit. Into a 24V battery (about 23–28V), ~2,100W is roughly 75–91A, which is under the 100A maximum charge current.
Input current against the inverter's 15A limit
Option A: two strings
14.8A
Option B: with Tigo
7.4A
The red line marks the 15A input limit.
Option A: balanced strings
Option B: Tigo on the 515W panels
Estimated harvest
~1,590W
~2,100W
Working voltage
~107V
~284V
Input current
14.8A, nearly at the limit
7.4A, lots of headroom
Extra cost
None
Two optimizers
Shade tolerance
Shade hurts one whole string
Good for the 515W panels, same as before for the 200W panels
Work needed
Re-cable between rows
Fit two optimizers behind the 515W panels
Biggest risk
Brushing against the 15A limit
Optimizer ratings need to be confirmed against the 515W panel
Before buying anything: the datasheet does not say what the inverter does when the array tries to push more than 15A (clip or fault), so do not plan around exceeding it. Option A sits right at the limit; Option B leaves about half of it free.
Inverter limits come from the unit's label and Anenji's datasheet for the ANJ-4000W-24V-WIFI. All other numbers are estimates at rated conditions, worked out from the panel figures shared in the chat (200W: about 24.3V Vmp, 29V Voc, 7.4A; 515W: about 34.6V Vmp, 40.75V Voc, 14.88A). Real output will be lower with heat, shade and wiring losses. Always confirm against the actual datasheets before wiring.